Electrotype plate



Dec. 21 1926 1,611,469

E. O. LOVELAND ELECTROTYPE PLATE Filed Jan. 20. 1926 I,"

INVENTOR 2 ATTCSRNEY Fatented Dec. 21, 1926.

un ire stares EMMETT 0. LOVELAND, OFKANSAS CITY, MIS SOURI, ASSIGNOR F ONE-YALE TO B. A.

SMALLFELDT, OF KANSAS CITY, IViI-SSOURI.

ELEGTROTYPE PLATE.

Application filed January 20. 1928. Serial No. sates.

My invention relates to electro-types and more particularly to a plate of that character for use on multigraph machines, the principal object of the invention being the making of a more rigid and accurate electrot-ype of this kind to eliminate defacement of the printed sheet through contact with blank spaces between the printing matter, and to eliminate uneven curvature of he plate.

In accomplishing this and other objects of the invention I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings wherein:

Fig. 1 is a perspective view of an electro-type embodying my improvements, and illustrating its application to a segment of a a multigraph machine.

Fig. 2 is a central, longitudinal section of a plate constructed according to my invention.

Fig. 3 is a transverse section of the same.

Fig. 4 is a detail perspective View of the finished plate elements.

In making plates of this character it is customary to lirst set up the type or other matter to eventually appear in the electro type, take an impression in wax and then electroplate the wax. Then the plate is removed from the wax and backed by lead or other soft metal in a manner well known in the practice of this art.

The rou 'h plate is then dressed down and curved to iit the periphery of a segment constituting a part of the multigraph machine or press.

The mold on which the electro-type is de posited comprises means for forming lips on the ends of the plate over which bands are applied to attach the plate to the seg" ment. As the plate can only be of a limited thickness and must be of suflicient body to carry the solid portions which are to be reproduced and to provide the attaching lips, it not infrequently occurs that the sheets printed in the machine are drawn into the open spaces between the printed matter and become smudged by contact with'the back of the plate. It also frequently happens that the open spaces between the type or out matter on a plate extends in such longitudinal arrangement that the plate is weakened along a suliiciently definite line that it bends unevenly so that it cannot lit smoothly on the multigraph segment, with the result that an imperfect impression is made on the printed sheet.

It is to overcome these disadvantages in the ordinary type of plate that I have devised my improvements which consist generically in elimination of a maximum amount of theelectrovpe metal and substituting therefor a back plate which is sweated onto the electro-type plate after the and the length being reduced to that of the ordinary plate minus the end lips.

W'ith the plate dressed to this thickness and length, and while still flat, a backing plate 2, preferably of tin plate, although it may be of any other suitable metal, is at tached to the'back of the electrotype by sweating or otherwise, to form a permanent part of the electro-type,,the backing plate being of sufficiently greater length than the electro-type to provide the end lips 3.

l i hen the two plates have been thus a.- sembled they are curved to fit the segment a. of the multigraph machine, the combined thickness of the electro-type and backing plate 2 corresponding to the usual thickness of an electro-t pe so that it will operate properly on the printing machine or press, and the lips 3 serving to carry the band whereby the plate is secured to the segment.

It is apparent that with my improvements the comparatively soft metal elcctro-typc may be of substantially the same thickness as the ordinary plate, but can be cut away to a greater depth for the open spaces about the type and out matter, the backing plate till -' being suiiiciently thin to avoid excessive projection Within the printing face of the plate, but because of its greater density and strength, serving to hold the electro-type 5 to its proper i:'ormati0n.

hat I claim and desire to secure by Letters-Patent is 1. An electro-type comprising a body plate having a printing surface, and a sheet 10 metal backing plate of different material,

permanently secured to the rear face of the body plate. 1

2. An electro-type comprising a body plate having a printing surface. and a thin backing plate of relatively stifi sheet metal, permanently secured to the rear face of the bod plate and projected beyond the ends of the body plate to form band lips.

In testimony whereof I ailii; my signature.

EMMETT O.-LOVELAND. 

